So a lady from south africa sent me a small package claiming that 4 grams would be a full flood....this can't be right.....right?Other people are collaborating saying there is definite effects at this low level of dosage..Is there a chance she sent me something that is not Iboga???

I would say so. Especially if you are light-weight. It may not be fully submersive, but I've been sensitive enough to have moderately deep visions/dreams that clear out the clutter in my brain/psychic space/body. No vomiting, but an energetic purge, lessons to be had, old memories dredged or at least looked at, and "Oh yeah!" moments abound.